Arm A: ALVAC placebo and potent ART for 92 weeks with a single 12- to 20-week therapy withdrawal period; Arm B: ALVAC placebo and potent ART for 84 weeks with a 4- to 6-week therapy withdrawal period, a 4-week therapy withdrawal period, and a 12- to 20-week therapy withdrawal period; Arm C: ALVAC vCP1452 vaccine and potent ART for 92 weeks with a single 12- to 20-week therapy withdrawal period; and Arm D: ALVAC vCP1452 vaccine and potent ART for 84 weeks with a 4- to 6-week therapy withdrawal period, a 4-week therapy withdrawal period, and a 12- to 20-week therapy withdrawal period.